US2385960A - Rotary take-up mechanism for sewing machines - Google Patents

Rotary take-up mechanism for sewing machines Download PDF

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Publication number
US2385960A
US2385960A US530466A US53046644A US2385960A US 2385960 A US2385960 A US 2385960A US 530466 A US530466 A US 530466A US 53046644 A US53046644 A US 53046644A US 2385960 A US2385960 A US 2385960A
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US
United States
Prior art keywords
thread
take
finger
ring
guard
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US530466A
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English (en)
Inventor
Zonis Sydney
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Singer Co
Original Assignee
Singer Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Singer Co filed Critical Singer Co
Priority to US530466A priority Critical patent/US2385960A/en
Application granted granted Critical
Publication of US2385960A publication Critical patent/US2385960A/en
Priority to FR944608D priority patent/FR944608A/fr
Priority to AT170131D priority patent/AT170131B/de
Priority to DEP24326D priority patent/DE822756C/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B49/00—Take-up devices, e.g. levers, for the needle thread
    • D05B49/04—Take-up devices, e.g. levers, for the needle thread rotary
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B51/00—Applications of needle-thread guards; Thread-break detectors

Definitions

  • This invention relates to improvementsin devices associated with rotary take-up mechanisms for sewing machines forpreventing continued abnormal winding of thread about the rotary thread-engaging take-u element or elements in the event of thread breakage.
  • the present invention is in the nature of an improvement in the threadsevering device disclosed and claimed in my prior U. 8. Patent No. 2,191,736, Feb. 27, 1940. s
  • the primary object of this invention is to provide automatically acting means for freeing the take-up from thread abnormally engaged by the take-up elements, in the event of thread breakage during a normal stitch-forming cycle.
  • Fig. l is a front end elevation, partly in section, of a sewing machine containing the improved thread-controlling and severing means, with the take-up cover-plate removed from the machine.
  • Fig. 2 is an enlarged section of the rear take-up mechanism, with the take-up cover-plate applied to the machine; the section being taken on substantiall the line 2-2 of Fig. 1.
  • Fig. 3 is an enlarged perspective view, partly in section, of the stationary thread-severing member.
  • Fig. 4 is a fragmentary front end elevation of the take-up mechanism similar to Fig. 1 and illustrating the beginning of an abnormal engagement of the thread by the rear take-up elements in the region of the maximum slack-thread giving position of said elements.
  • Fig. 9 is a detail view in front elevation of the rear take-up device and the stationary thread-severing member associated therewith, and showing thread-coils wound upon the severing member and the thread-controlling finger of the take-up.
  • Fig. 10 is an enlarged section of the face-plate and the cover-plate associated therewith. the section being, taken on the line I 0-" of Fig. 1 and showing a portion of the take-up mechanism; Fig.
  • FIG. 11 represents a front side elevation ofthe thread-guard which is disposed between the front and rear take-up devices, the face-plate of the I manner to impart work-advancing and return machine and the cover-plate associated therewith being shown in vertical section.
  • Fig. 12 is a reduced front elevation of the take-up cover-plate;
  • base frame includins a work-supporting bed-plate "and a hollow bracket-arm head ll.
  • Journaled for vertical reciprocation in the bracket-arm head H is a needle-bar ll carrying at its lower end a needle 18; said needle-bar I! being endwise reciprocated vertically by any usual or suitable actuating connections with a horizontally disposed rotary actuating shaft 14.
  • the work is advanced past the stich-forming mechanism by a feed-dog is of the drop-feed type: said feed-dog ll being carried by a feed-bar ll pivotally connected, at its rearward end, to a feed-advance rocker ll actuated in any suitable movements to the feed-dog II.
  • the feed-bar H has a fork II, in which is slidably disposed a pivot-block 20 carried by a feed-lift crank-arm II.
  • the crank-arm II is actuated in any usual or suitable manner to impart rising and falling movements to the feeddog ll.
  • Opposed to the feed-dog is a presserfoot 22 secured to the lower end of the usual spring-depressed presser-bar 23 which is endwise vertically movable in the bracket-arm head ll.
  • the actuating shaft is at the bracket-arm head end thereof carries an inner take-up disk I.
  • the outer take-up disk of said prior construction has been cut away centrally in the present machine to provide a threadconfining ring as.
  • the ring 25 is spaced from and secured to the disk 20 by a pair of adjacent and. preferably, radially equidistant thread-engagin studs or elements 2:.
  • the take-up elements Being carried by the rotary actuating shaft ll, the take-up elements it perform one rotation for each complete reciprocation -of the needle It; said elements "rotating ina counter-clockwise direction when viewed as in Fig. 1 of the drawings.
  • the rear or supplemental take-up is carried by a rotary shaft 21 disposed in parallelism with and, in the present case, at substantially the level of the actuating shaft II.
  • the shaft 21 is driven,
  • shaft 21 being joumaled adjacent its forward end in a circumferentially grooved thread-engaging studs or elements ii is an outer thread-confiningring 32 disposed. in substantially the same vertical plane as the ring 2
  • the thread-engaging elements II are preferably radially equidistant and the disk ll is preferably provided centrally in its outer face .with an annular clearance-recess 38.
  • the rearward portion of the bracket-arm head II is internally provided with a shouldered segmental recess 81. Seated in said recess is the outwardly bent rim portion of one of the side flanges 38 of a reel-shaped thread-guide 39 which surrounds the hub 29 of the supplemental take-up disk in spaced relation to said hub.
  • the other side flange 40 of said thread-guide has itsrim portion bent outwardly to extend into a shallow annular recess provided in the face-plate 34 at the inner side thereof, thereby to prevent escape of the thread between the thread-guide flange 4
  • Theside flanges 38 and 40 ofthe reel-shapedmember provide between them a circumferen- :ilally and axially rounded thread-guiding groove ms hub is of the at, or supplemental take-up disk has anaperture 42 extending. substantially parallel to the rotation axis of the'shaft 21.
  • V I'lxedly disposed in'the hub-aperture 42 is the reduced shank 43 of'a thread-controlling finger 44 which is tapered toward its outer or free end, saidfinger 44 extending outwardly through and beyond the plane of the thread-confining ring 32
  • the finger 44 is lengthwise 'slightlyinclined from.
  • the finger 44 is also preferably disposed substantially medianly between the disk-radii of the thread-enga in elements ll, and between said elements and the axis of rotation thereof.
  • a thread-guard Spanning the space between the front and rear thread-confining rings 2
  • are Vreversely curved; the centers of curvatureiof said edges 4
  • serves to limit downward movement of the portion of the x 7' thread extending between the front and rear take-up devices. while the. arm "prevents undue whipping vor that portion of the thread. i
  • of the thread-guard is located I in the region wherein the rear thread-enga in elements ii are in that portionTof their oyclein which they are passing through maximum slackthread giving position to the position wherein said elements begin to draw up the thread.
  • first approached by the elements II in their movement through maximum slack-thread giving position is cut away or beveled to provide a thread-deflecting face II which is inclined to the plane of the thread-confining ring 32; said face extending across and outwardly beyond the plane of the thread-confining ring 12; the outer faces of the base-block 4
  • Adjacent its thread-deflecting face 54, the baseblock 4
  • the threadsevering member-arm It extends from the baseblock 4
  • the threadsevering. arm 53 is bent to form a finger N which extends laterally from said am through the ring 32, in' close proximity to said ring and in a directionso as to be' disposed substantially normal to the plane of rotation of the take-up disk 30.
  • 'Ihe finger of the stationary thread-severing member is disposed between the orbital paths of the thread-controlling finger 44 andthe take-up elements 3
  • the face-portion 58 of the thread-severing member finger 55 which is proximate to the axis of rotation of the finger 44 is preferably concavely curved so asto provide clearance for said finger.
  • theiside edge of the finger I! first approached by. the thread-controlling finger 44 is-beveled to form a cutting edge 61.
  • the thread-severing member arm N is V-shaped in a'directlo'n to form a cutting-edge 58 at the side of said member last approached by the finger 44.
  • guard-plate 5 Removably attached to the base-block 4
  • the guardplate 59 is providedwith a circular opening affording access to the screws employed for securing the front take-up disk 24 for rotation with the shaft l4.
  • a similar opening H in the rearward portion of the guard-plate ll provides clearance for the thread-controlling finger 44.
  • Extending into the opening II is a guard-plate slot 62 affording clearance for the shank II of the thread-severing member; said slot
  • the needle thread t drawn from its supply (not shown), is threaded through the apertures of a conventional thread-guide 8
  • the presser-bar controlled thread-guide II which directs the thread to the rear take-up device, is disposed verticallybelow the rear take-up device in a vertical plane normal to the take-up disk Ill and between the axis of rotation of the disk Id and the thread-deflectins face ll of the base-block 4..
  • the thread-loop a may in some instances be thrown by said elements 3
  • the thread-loop a will be carried artly around the thread-controlling finger M by the ring 32 and a second thread-loop b will be formed as an extension or the inner limb of the thread-loop a.
  • One limb of the thread-loop b. i. e., the continuation of the inner limb of threadloop a will then be engaged by the advance one of the take-up elements ii and will be drawn across the thread-deflecting face ll; thereby resulting in casting a second thread-limb across the rim and upon the outer face of the rin 82, as shown in Fig. 8 of the drawings.
  • the hood If en aged thereby as shown" in may be conveniently swung aside to provide aeoesstothefingerurorthemrmorremoving the loops of thread therefrom.
  • the hood II is preferably provided with a plurality oi apertures II through which the presence or thread-coils upon the finger ll may be residily observed.
  • thread-eng ging take-up element having an or- "bital path of rotation, means for rotating said side of said guard-ring opposite the take-up element side thereof.
  • a rotary thread-engaging take-up element in combination, a rotary thread-engaging take-up element, a threadconfining guard-ring rotatable with saidtake-up element, a thread-guide disposed to direct the thread to said take-up element in substantially the plane of rotation of said element, and threaddeflecting means disposed adjacent and radially externally of said. guard-ring in position for engagement by the position of the thread between said thread-guide and the take-up element under a condition of abnormal engagement oi the thread by said take-up element, said thread-deflecting means extending across the plane Of said guardring and being disposed out of eii'ective engagement by the thread during the normal stitchforming cycle.
  • a thread-engaging take-up element having an orbital path of rotation; means for rotating said take-up element,- -a thread-confining guardmember rotatable with said take-up element, a. thread-guide disposed to direct the thread to said take-up element in substantially the plane of said orbital path, the directions of lead o1 the thread tosaid element being angularly different under conditions of normal and abnormal engagement of the thread by said take-up element in the same position of said element, and means rendered effective by the angular change from normal to abnormal lead of the thread for defleeting the thread laterally across the outer peripheral edge of said guard-member.
  • a thread-engaging take-up element having an orbital path of rotation, means for rotating said take-up element, a thread-confining guard-ring carried by said take-up element for rotation therewith, a thread-guide disposed to directthe' thread to said take-up element in substantially the plane 01 said orbital path, the directions 01' lead or the thread to said element in the maximum slack-thread giving position of said takeup element being angularly diiIerent under conditions of normal and abnormal engagement of the thread by said element, and thread-deflecting means disposed externally of saidorbital path 01 the take-up element and in the path of the thread in the abnormal lead of the thread to said take-up element, said thread-deflectin means extending across the plane of said guardring at an inclination to said plane.
  • thread take-up element having an orbital path of rotation and about which elementthe thread may abnormally become wound
  • a thread-guide disposed to direct the thread to said take-up element in substantially the plane of said orbital path, the lead of the thread in said plane to said take-up element during the normal stitch-forming cycle being angularly dverent from an abnormal lead of the thread when the thread is abnormally wound about the take-up element in the same position of said element in its orbital element, a thread-confining guard-ring rotatable with said take-up element, a thread-controlling finger having an orbital path oi rotation radially within the orbital path 01' said take-up element,
  • a thread-engag ns take-up element having an orbital path of rotation, means for rotating said element, a thread-confining guard-ring rotatable with said take up element, a thread-controlling finger having an orbital path of rotation radially within the orbital path 01' said take-up element, a thread-severing member extending through said guard-ring and disposed between the orbital paths of said take-up element and thread-controlling finger, a thread-guide for directing the thread to said take-up element, and threaddefiecting means disposed externally adjacent said guard-ring and automatically rendered effective upon the thread when abnormally engaged by said take up element to deflect the thread across the outer peripheral edge of said uard-ring.
  • thread-engaging take-up element having an orbital path of rotation, means for rotating said element, a thread-confining guard-ring rotatable with said take-up e1ement,'a thread-controlling flnger having an orbital path of rotation radially within the orbital path of said take-up element, a thread-severing member extending through said guard-ring and disposed between the orbital paths of said take-up element and threadcontrolling finger, a thread-guide for directing the thread to said take-up element, and threaddeflecting means disposed externally adjacent said guard-ring in the region of the maximum slack-thread giving position of said take-up element, said thread-deflecting means being'disposed in the path of the thread under a con- 7 dition of abnormal engagement oi the thread by said take-up element, and said thread-deflecting means being disposed out 'of range of the thread during the normal stitch-forming cycle.
  • a radially oute ithread-engaging take-up element and a radially inner threadcontrolling finger rotatable about a common axis is spaced orbital paths, said thread-controlling finger extending transversely of the plane of its orbital path and being axially inclined away from said axis in a direction toward the tree end of the finger, and .a stationary member disposed between said orbital paths in the region of the maximum slack-thread giving position of said take-up element.
  • a thread-engaging take-up element carried by said disk ior rotation in an orbital path
  • a thread-confining guard-ring carried by said take-up element in spaced relation to and for rotation with said disk
  • a thread-guide disposed to direct the thread to said take-up element in substantially the plane of the orbital path of said take-up element.
  • a thread-controlling finger carried by said disk for rotation path of said take-up element, said finger having a free end extending outwardly through said guard-ring and being axially inclined toward its tree end in a direction away from the rotation axis of said disk.
  • a thread-engaging take-up element havin an orbital path-of rotation, means for rotating said element, a thread-confining guardbital path of rotation means for rotating said take-up element, a thread-confining guard-ring rotatable with said take-up element, a threadcontrolling finger rotatable with said take-up element in an orbital path radially within the orbital path of said take-up element, said threadcontrolling finger extending'through and beyond the plane of said guard-ring from the take-up element side thereof, a stationary thread-severin an orbital path radially within the orbital 1 ing member located in the region of the maximum slack-thread giving position of said take-up element.
  • said thread-severing member comprising an arm terminating in a finger extending laterally from said arm and through said guardring carried by said take-up element, a threadguide disposed to direct the thread in substantially the plane of said orbital path for engagement by said take-up element, a thread-controlling finger rotatable with said take-up element in an orbital path radially within said guardring, said finger having a tapered free end extending through said guard-ring and being axially inclined toward its free end in a direction I away from the rotation axis of said take-up ele,
  • a; stationary thread-severing finger extending through said guard-ring toward said disk, said thread-severing finger being disposed in the region of the maximum slack-thread giving position of said take-up element and between ring across the plane of the orbital path of said take-up element, said arm and the fingerthereoi being each provided with a cutting edge, and the finger of said arm being disposed between the orbital paths of said'take-up element and said thread-controlling finger, a hood housing the free end portion of said thread-controlling finger, said hood beingprovided with a thread-clearance slot in the region of said thread-severing member, and supporting means for said hood providing for removal of the hood from its thread-controlling finger housing position.
  • a rotary thread-engaging take-up element in combination, a rotary thread-engaging take-up element, a thread-confining guard-member associated with said take-up element and disposed to confine the thread for normal engagement by said takeup element thread-guide disposed to direct the thread to said take-up element, and means rendered effecthe orbital paths of said take-up element and tive upon abnormal engagement of the thread thread-controlling finger, and means rendered effective upon abnormal engagement of the thread by said take-up element for deflecting the thread laterally across the outer peripheral edge and upon the outer face or said guard-ring.
  • a thread-engaging take-up element having an orby said take-up element for deflecting the thread laterally across the outer peripheral edge of said guard-member and upon the side of said guard-member opposite the take-up element side 40 thereof;

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US530466A 1944-04-11 1944-04-11 Rotary take-up mechanism for sewing machines Expired - Lifetime US2385960A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US530466A US2385960A (en) 1944-04-11 1944-04-11 Rotary take-up mechanism for sewing machines
FR944608D FR944608A (fr) 1944-04-11 1947-03-18 Mécanisme releveur rotatif pour machines à coudre
AT170131D AT170131B (de) 1944-04-11 1948-10-07 Fadenaufnehmermechanismus für Nähmaschinen
DEP24326D DE822756C (de) 1944-04-11 1948-12-10 Fadengebereinrichtung an Naehmaschinen

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US530466A US2385960A (en) 1944-04-11 1944-04-11 Rotary take-up mechanism for sewing machines

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US2385960A true US2385960A (en) 1945-10-02

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US530466A Expired - Lifetime US2385960A (en) 1944-04-11 1944-04-11 Rotary take-up mechanism for sewing machines

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US (1) US2385960A (de)
AT (1) AT170131B (de)
DE (1) DE822756C (de)
FR (1) FR944608A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446245A (en) * 1945-03-10 1948-08-03 Union Special Machine Co Sewing machine
US2511081A (en) * 1946-10-10 1950-06-13 Union Special Machine Co Rotary take-up means for sewing machines
US2554144A (en) * 1948-07-30 1951-05-22 Singer Mfg Co Rotary take-up for sewing machines
US2874665A (en) * 1954-09-18 1959-02-24 Tokyo Juki Industrial Co Ltd Rotary take-up sewing machine
WO2000043583A1 (de) * 1999-01-21 2000-07-27 Johannes Sahl Kettenstich-nähmaschine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1102536B (de) * 1956-06-30 1961-03-16 Denzaburo Terayama Umlaufende Einwellen-Mehrscheiben-Fadenaufnahmevorrichtung fuer hochtourige Naehmaschinen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446245A (en) * 1945-03-10 1948-08-03 Union Special Machine Co Sewing machine
US2511081A (en) * 1946-10-10 1950-06-13 Union Special Machine Co Rotary take-up means for sewing machines
US2554144A (en) * 1948-07-30 1951-05-22 Singer Mfg Co Rotary take-up for sewing machines
US2874665A (en) * 1954-09-18 1959-02-24 Tokyo Juki Industrial Co Ltd Rotary take-up sewing machine
WO2000043583A1 (de) * 1999-01-21 2000-07-27 Johannes Sahl Kettenstich-nähmaschine
US6405666B1 (en) 1999-01-21 2002-06-18 Johannes Sahl Chain stitch sewing machine

Also Published As

Publication number Publication date
AT170131B (de) 1952-01-25
FR944608A (fr) 1949-04-11
DE822756C (de) 1951-11-29

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